2, local TCP or UDP

3, end-local-end, the use of cache (very slow)

In the premise of not triggering a memory overflow or application unresponsive, or the first two ways to rely on the first two ways, you can also open a separate thread for the exchange of local big data.

You can refer to the knowledge about AIDL on the internet, you can realize the function you want by using AIDL;

If you don't mind the trouble, you can use the content provider as well.

I hope this helps you.